Programming instructions

Resistor
 National Instruments Corporation 2-19 Multisim Component Reference Guide
TC2 = Second order temperature coefficient
T = Temperature of the resistor
2.6.1 About Resistance
Ohm's law states that current flow depends on circuit resistance:
I = E/R
Circuit resistance can be calculated from the current flow and the voltage:
R = E/I
Circuit resistance can be increased by connecting resistors in series:
R = R1 + R2 +...+ Rn
Circuit resistance can be reduced by placing one resistor in parallel with another.
2.6.2 Characteristic Equation
The current through the resistor uses the model:
where:
i = current
V
1
= voltage at node 1
V
2
= voltage at node 2
R = resistance
2.6.3 Changing a Placed Resistor’s Value
 To change the value, and other parameters of a placed resistor:
1. Double-click on the resistor and select the Value tab.
2. Select the desired resistance from the Resistance(R) list. If it is not there, type the value
you want.
3. Select the desired tolerance from the To l er ance list, or type in a value.
i
VV
R
=
−
12
ComponentRef.book Page 19 Thursday, December 7, 2006 10:12 AM